CAJ | 학술논문

中高层大气瞬态发光事件( TLEs)是临近空间研究的热点课题,研究TLEs的辐射特性、扰动电子密度等问题的关键在于求解电子能量分布函数( EEDF)。文中基于玻尔兹曼方程数值模型,求解得到了TLEs中气体随时间变化的EEDF；结合唯一变量法,获得了求解过程中的时间步长(δt )、电子能量网格间隔(△ε)、约化电场( E/N)、大气压强( P)、大气温度( tgas )、麦克斯韦分布初始电子平均能量( tel )等对EEDF的影响及其规律；提出了如何在实际复杂环境、变化电场的情况下,利用Boltzmann方程数值模型,并运用这些规律来求解TLEs中气体EEDF,以得到更加准确的结果。
중고층대기순태발광사건( TLEs)시림근공간연구적열점과제,연구TLEs적복사특성、우동전자밀도등문제적관건재우구해전자능량분포함수( EEDF)。문중기우파이자만방정수치모형,구해득도료TLEs중기체수시간변화적EEDF；결합유일변량법,획득료구해과정중적시간보장(δt )、전자능량망격간격(△ε)、약화전장( E/N)、대기압강( P)、대기온도( tgas )、맥극사위분포초시전자평균능량( tel )등대EEDF적영향급기규률；제출료여하재실제복잡배경、변화전장적정황하,이용Boltzmann방정수치모형,병운용저사규률래구해TLEs중기체EEDF,이득도경가준학적결과。
Transient Luminous Events ( TLEs) in the upper atmosphere is a focus of near space,to solve the Electron Energy Distribution Function (EEDF) is the key to research the TLEs’ problems of the radiation characteristics,the disturbed electron density and so on. Based on the numerical model of Boltzmann equation,the time evolution of the EEDF is calculated;combined with the only variable prin-ciple,found that many parameters,such as the time step ( δt ) ,the grid interval of electronic energy ( △ε) ,reduced electric field ( E/N) , atmospheric pressure ( P ) ,atmospheric temperature ( tgas ) and initial electric average energy of Maxwell distribution ( tel ) ,have influenced on EEDF and its regularity. Under the complicated environment and the changing electric field in the actual in order,how to solve the EEDF of the gases in TLEs to get more accurate result using the numerical model of Boltzmann equation are identified.